(ii) following any modification of the Aircraft, any Engine
 or any Part or the permanent replacement of any Engine
 or Part in accordance with this Agreement, so as to
 ensure that the rights of Lessor as owner of the
 Aircraft and under this Agreement apply with the same
 effect as before; or

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 (iii) to establish, maintain, preserve, perfect and protect
 the rights of Lessor under this Agreement or in the
 Aircraft and, at the cost of Lessor, the rights of any
 Financing Party, in particular (without limitation), if
 in the Country of Registration there shall be, or shall
 be brought into force, any legislative or other
 provisions giving effect to the Geneva Convention or
 otherwise relating to recognition of rights in aircraft,
 Lessee shall at its own cost forthwith do all such acts
 as may be necessary to perfect recognition of Lessor's
 title to and interest in the Aircraft and, at the cost
 of Lessor, the rights of any Financing party as
 mortgagee and/or assignee in accordance with such
 legislative or other provisions.

 If the Country of Incorporation has, or at any time brings
 into force, any legislative or other provisions giving effect
 to the Convention on International Interests in Mobile
 Equipment (the "Convention") and/or the Protocol to the
 Convention on International Interests in Mobile Equipment on
 Matters Specific to Aircraft Equipment (the "Protocol"),
 Lessee at its own cost and expense shall from time to time, do
 or cause to be done any and all acts and things which may be
 required or desirable (in the reasonable opinion of Lessor) to
 ensure that Lessor and, at the cost of Lessor, any Financing
 Party have the full benefit of the Convention and/or the
 Protocol in connection with the Aircraft and any Engine,
 including (but not limited to):